Pen



FIG. 1 is a right side elevational view of a fountain pen showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof in open condition; and

FIG. 6 is a front elevational view thereof in open condition. The sides of the body and the cap of the pen opposite those shown in FIGS. 1 and 4 and FIGS. 5 and 6 are identical thereto. 

The ornamental design for a fountain pen, substantially as shown and described. 